A5025680786- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Nuclear Materials and Properties
- Graphite, nuclear technology, radiation studies
- Boron Compounds in Chemistry
- Advanced Radiotherapy Techniques
- Fusion materials and technologies
- Muon and positron interactions and applications
- Ion-surface interactions and analysis
- Biofield Effects and Biophysics
- Nuclear and radioactivity studies
- Particle Detector Development and Performance
- Silicon and Solar Cell Technologies
- Energetic Materials and Combustion
- Radioactivity and Radon Measurements
- Radiation Effects and Dosimetry
- Spacecraft and Cryogenic Technologies
- Atomic and Subatomic Physics Research
- Polymer Nanocomposite Synthesis and Irradiation
- Transport and Logistics Innovations
- Advanced Thermodynamic Systems and Engines
- X-ray Spectroscopy and Fluorescence Analysis
- Vehicle emissions and performance
Research Centre Rez
2012-2024
Czech Technical University in Prague
2009-2014
The paper presents new knowledge on primary defect formation in tungsten (W) and iron (Fe) irradiated by fission high-energy neutrons at near-room temperature. Using a well-established method of positron-annihilation lifetime-spectroscopy (PALS), it was found that irradiation W the reactor from p(35 MeV)-Be generator leads to small radiation-induced vacancy clusters with comparable mean size. In case Fe, smaller size measured after compared generator. It one reasons larger defects lower...
In the year 2011, a research project has started focus on building of neutron radiography facility at LVR-15 reactor in Rez, Czech Republic. One unused horizontal channels was chosen to be adapted for this purpose. However, original beam parameters having high presence fast neutrons which may damage detector, and gamma radiation causes undesired background were unsuitable. The need an intensive thermal with very low ratio led decision installing filter into channel tube. As layout is spatial...
YAP:Ce (YAlO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> :Ce <sup xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> , Yttrium Aluminum Perovskite, Ce doped) crystals with appropriate converters seem to be prospective scintillators for neutron detection. An important aspect of detection inorganic is the ability discriminate radiation from gamma by signal pulse height. For a detailed measurement this aspect, crystal scintillator...
The LVR-15 reactor is a 10 MW tank type multi-purpose research reactor. utilized for production of wide scale isotopes with the main focus on generators, testing materials and chemical regimes coolant in irradiation rigs experimental loops (in-pile out pile), beam experiments neutron transmutation doping. current capacity doping was one facility dedicated to maximum 3 inch ingots. Recently, this increased by new device. Although, market demand ingots diameters up 6 inch, occasionally even...
Spent fuel containing material (SFCM) can arise during severe nuclear reactor accident by melting of a core and surrounding (corium) or in spent storage. It consists fuel, fission products, activation products materials from cladding, concrete, etc. The paper deals with dose temperature characteristics inside the SFCM after transition molten mixture to solid state. Calculations were made on simplified spherical models, without connection some specific accident. rate was estimated for alpha,...
Intentionally doped LiCaAlF 6 (LiCAF) single crystals are prospective scintillators, especially for thermal neutron detection through the Li(n,t) 4 He nuclear reaction. Four different LiCAF scintillator samples were tested in various and gamma fields. Two of LiCAF:Eu LiCAF:Eu,Na crystals, another two made micro dispersed transparent rubber, with rubber dimensions. All contain lithium enriched to[Formula: see text]Li. A plutonium–beryllium source was used as a source. The spectrum modified by...
The HK-1 neutron beam line at the LVR-15 reactor in ÚJV Řež, Czech Republic, was used for vitro cell studies carried out framework of FRINGE project, aiming on development a novel capture therapy technique using Gd containing compounds. fluence rate close exit experimentally assessed. Neutron data were combined with Monte Carlo simulations performed MCNP 6.1 code, to model well-type vial thin layer cells, and without Gd, as well supporting media. Aim study evaluate energy deposited by...
Abstract The LVR-15 reactor is a light water research situated at the Research Centre Řež, near Prague. It operates as multipurpose facility with maximum thermal power of 10 MW. core usually contains from 28 to 32 fuel assemblies total mass 235U about 5 kg. Emitted radiation caused by fission shielded moderating water, steel vessel, and heavy concrete. This paper deals measurement analysis gamma spectrum outer surface concrete wall, behind biological shielding, mainly in 3- 10-MeV energy...
In the paper application of effective source to solution activation detector activities in reactor pressure vessel cavity VVER-1000 is presented. The method applies Boltzmann transport operator time integrated data obtain activities. Weighting by dependent depletion activity, result calculation activity. approach works because inherent linearity radiation non-multiplying time-invariant media. Integrated this way, are referred as ‘effective source’. thereby enables analyst replace numerous...
Suitable dosimeter methods have to be developed measure the different dose contributions in phantoms exposed epithermal/thermal neutron beams of a research reactor. The method based on Fricke xylenol orange gel form layers has shown very effective for achieving images various components air or with high fluence rate. Another useful is use TLD-700 chips, from whose response gamma and thermal can obtained by means appropriate parameters glow curve.
In this study, a measurements of neutron field using special positioning device with <sup>6</sup>Li + Si detector and image plate is described. The were provided for Boron Neutron Capture Therapy (BNCT) channel the LVR-15 reactor in Research Centre Rez Ltd., Czech Republic. Mapping represents an essential crucial part planning BNCT treatment (especially patients suffering from brain tumor Glioblastoma Multiforme).
Gel dosimeters with planar geometry (3 mm in thickness, many centimeters diameter) have shown noticeable potentiality for dosimetry phantoms exposed to the epithermal neutron beams of research reactors. In fact, it is possible achieve images spatial distribution gamma dose, dose and due charged particles generated by thermal reactions. Such a separation attained means measurements gel having suitable isotopic composition, thanks geometry, transport phantom not sensibly affected change matrix...
The LVR-15 reactor is a 10 MW tank type multi-purpose research reactor. utilized for production of wide scale isotopes with the main focus on <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">99</sup> Tc generators, testing materials and chemical regimes water gas in irradiation rigs experimental loops (in-pile out pile), beam experiments neutron transmutation doping. current capacity doping was one facility dedicated to maximum 3 inch ingots....
Dosimetry in tissue exposed to the epithermal neutron beams utilized for BNCT is complex, due multiplicity of possible reactions and consequently secondary radiation that contains photons, charged particles recoil nuclei. Owing different radiobiological effectiveness various components absorbed dose, it necessary attain evaluation each them. In addition, spatial distributions these dose changes considerably with size shape irradiated volume. Therefore, dosimetry requires suitably developed...